Method of producing filamentary material



June 12, 1928. 1,672,943

J. G. JACKSON METHOD OF PRODUCING FILAMENTARY MATERIAL Filed Jan. 15,1927 Il/IIIllI/I I I l I @2751: f zz- JG. Jac'kfian Patented June 12,1928.

PATENT OFFICE.

JOHN GRANT JACKSON, OF C'EATHAM, ONTARIO, CANADA.

METHOD OF PRODUCING FILAMENTARY MATERIAL.

Application filed January 15, 1827. Serial No. 181,874.

My invention relates to improvements in filamentary materials andmethods for producing same, and the object of the invention is to devisea method of treating filamentary materials whereby their flexibility isgreatly increased.

A further object is to produce filaments which when formed into yarns orfabrics will result in a more coherent product than is the case wherethe filaments are not so treated.

By my method I take a filament which-is either initially formed in, oris reduced to, a liquid or plastic state and impress thereon a vibratingwave eflt'ect and simultaneously cause the said filament to become fixedintoa solid state with the result that it assumes a permanently wavedform.

To carry out my invention I may employ for example, in the case ofmaterials susceptible to being squirted into filamentary form, a nozzlefor squirting the filamentary material in a liquid or plastic state intoa bath of fixing solution as. in any of the well known methods for theproduction of arti- I ficial silk or the like, and a vibratory diaphragmfor directing upon the squirted filamentary material after it emergesfrom the nozzle, through the medium of the fixing solution, a vibratorywave efiect which imparts to the filament a waved form correspondingthereto.

I will now describe the apparatus employed, more particularly re erencebeing had to the accompanying drawing in which Fig. 1 represents adiagrammatic view of a an apparatus suitable for carrying out my methodon'squirted filaments, and

Fig. 2 is adiagrammatic view of a suitable apparatus for carrying out mymethod in the case of fusible filaments.

Referring to the apparatus depicted in .Fig. 1, 1 is the nozzle adaptedto squirt the liquid or plastic material A in a filamentary form B intoa bath 2 of fixing solution. 3

is a tube communicating with the bath and filled with fixing solutlontherefrom, said tube bein provided with adiaphragm 4 vibrated y anelectroma et 5 ener ized by an alternating current 0 any desirefrequency.

When the filament to be treated is of the type which is reduced to theliquid or plastic state by heat and then solidified by cooling as in thecase of fibres made from vitreous materials, the squirting nozzle 1 is,of course, not required, being replaced by means for feeding andreducing the filament to molten form. The fixing solution isalso'replaced by a cooling medlum which may take the form of an airblast in which case the vibratory wave effect generated by the diaphragmwill be impressed upon the air constituting the cooling medium so thatthe filament will be subjected to the impressed wave effect at the sametime as it is being cooled and solidified. An apparatus for theapplication of my method to such material is clearly illustrated in Fig.2 of the drawing in which B represents the fusible filament fed down bythe feed rolls 6 past the impinging heated gas jets from the nozzles 7which fuse the filament which is subsequently cooled and solidified bythe impinging cold air blasts from the nozzle 8, one of such nozzles 8being provided with the diaphragm 4vibrated by the electromagnet 5energized in the same manner as the electromanget 5 (Fig. 1).

Although I have described and illustrated the impressing of a waveeffect upon the filaments treated through the fixing or solidifyingmedium I may produce the same result by applying the vibratory waveeffect in any other way which willimpart such effect to the filamentwhile it is being chan ed from a liquid or plastic state to the solidorm.

A filament formed by my method will possess the advantage that therewill be no tendency for it to assume a straight form as would be thecase where such filament is waved after solidification.

What I claim as my invention is:

1. A method for increasing the flexibility and elasticity of formedfilaments which consists in impressing thereon while in an unsolidifiedstate a vibratory wave effect, and causing such filament to becomesolidified while so acted upon whereby the filament as- 100 sumes apermanently waved form.

2. A method for increasing the flexibility and elasticity of formedfilaments which consists in impressing thereon while in an unment beingtransmitted throng the solidi- 11o fying medium.

JOHN GRANT JACKSON.

solidified state a vibratory wave efiect, and

